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-rw-r--r--src/transport/gnunet-service-transport_ats.c920
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diff --git a/src/transport/gnunet-service-transport_ats.c b/src/transport/gnunet-service-transport_ats.c
deleted file mode 100644
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1/*
2 This file is part of GNUnet.
3 Copyright (C) 2015 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20/**
21 * @file transport/gnunet-service-transport_ats.c
22 * @brief interfacing between transport and ATS service
23 * @author Christian Grothoff
24 */
25#include "platform.h"
26#include "gnunet-service-transport.h"
27#include "gnunet-service-transport_ats.h"
28#include "gnunet-service-transport_manipulation.h"
29#include "gnunet-service-transport_plugins.h"
30#include "gnunet_ats_service.h"
31
32/**
33 * Log convenience function.
34 */
35#define LOG(kind, ...) GNUNET_log_from (kind, "transport-ats", __VA_ARGS__)
36
37
38/**
39 * Information we track for each address known to ATS.
40 */
41struct AddressInfo
42{
43 /**
44 * The address (with peer identity). Must never change
45 * while this struct is in the #p2a map.
46 */
47 struct GNUNET_HELLO_Address *address;
48
49 /**
50 * Session (can be NULL)
51 */
52 struct GNUNET_ATS_Session *session;
53
54 /**
55 * Record with ATS API for the address.
56 */
57 struct GNUNET_ATS_AddressRecord *ar;
58
59 /**
60 * Performance properties of this address.
61 */
62 struct GNUNET_ATS_Properties properties;
63
64 /**
65 * Time until when this address is blocked and should thus not be
66 * made available to ATS (@e ar should be NULL until this time).
67 * Used when transport determines that for some reason it
68 * (temporarily) cannot use an address, even though it has been
69 * validated.
70 */
71 struct GNUNET_TIME_Absolute blocked;
72
73 /**
74 * If an address is blocked as part of an exponential back-off,
75 * we track the current size of the backoff here.
76 */
77 struct GNUNET_TIME_Relative back_off;
78
79 /**
80 * Task scheduled to unblock an ATS-blocked address at
81 * @e blocked time, or NULL if the address is not blocked
82 * (and thus @e ar is non-NULL).
83 */
84 struct GNUNET_SCHEDULER_Task *unblock_task;
85
86 /**
87 * Set to #GNUNET_YES if the address has expired but we could
88 * not yet remove it because we still have a valid session.
89 */
90 int expired;
91};
92
93
94/**
95 * Map from peer identities to one or more `struct AddressInfo` values
96 * for the peer.
97 */
98static struct GNUNET_CONTAINER_MultiPeerMap *p2a;
99
100/**
101 * Number of blocked addresses.
102 */
103static unsigned int num_blocked;
104
105
106/**
107 * Closure for #find_ai_cb() and #find_ai_no_session_cb().
108 */
109struct FindClosure
110{
111 /**
112 * Session to look for (only used if the address is inbound).
113 */
114 struct GNUNET_ATS_Session *session;
115
116 /**
117 * Address to look for.
118 */
119 const struct GNUNET_HELLO_Address *address;
120
121 /**
122 * Where to store the result.
123 */
124 struct AddressInfo *ret;
125};
126
127
128/**
129 * Provide an update on the `p2a` map size to statistics.
130 * This function should be called whenever the `p2a` map
131 * is changed.
132 */
133static void
134publish_p2a_stat_update ()
135{
136 GNUNET_STATISTICS_set (GST_stats,
137 gettext_noop ("# Addresses given to ATS"),
138 GNUNET_CONTAINER_multipeermap_size (p2a) - num_blocked,
139 GNUNET_NO);
140 GNUNET_STATISTICS_set (GST_stats,
141 "# blocked addresses",
142 num_blocked,
143 GNUNET_NO);
144}
145
146
147/**
148 * Find matching address info. Both the address and the session
149 * must match; note that expired addresses are still found (as
150 * the session kind-of keeps those alive).
151 *
152 * @param cls the `struct FindClosure`
153 * @param key which peer is this about
154 * @param value the `struct AddressInfo`
155 * @return #GNUNET_YES to continue to iterate, #GNUNET_NO if we found the value
156 */
157static int
158find_ai_cb (void *cls,
159 const struct GNUNET_PeerIdentity *key,
160 void *value)
161{
162 struct FindClosure *fc = cls;
163 struct AddressInfo *ai = value;
164
165 if ((0 ==
166 GNUNET_HELLO_address_cmp (fc->address,
167 ai->address)) &&
168 (fc->session == ai->session))
169 {
170 fc->ret = ai;
171 return GNUNET_NO;
172 }
173 return GNUNET_YES;
174}
175
176
177/**
178 * Find the address information struct for the
179 * given @a address and @a session.
180 *
181 * @param address address to look for
182 * @param session session to match for inbound connections
183 * @return NULL if this combination is unknown
184 */
185static struct AddressInfo *
186find_ai (const struct GNUNET_HELLO_Address *address,
187 struct GNUNET_ATS_Session *session)
188{
189 struct FindClosure fc;
190
191 fc.address = address;
192 fc.session = session;
193 fc.ret = NULL;
194 GNUNET_CONTAINER_multipeermap_get_multiple (p2a,
195 &address->peer,
196 &find_ai_cb,
197 &fc);
198 return fc.ret;
199}
200
201
202/**
203 * Find matching address info, ignoring sessions and expired
204 * addresses.
205 *
206 * @param cls the `struct FindClosure`
207 * @param key which peer is this about
208 * @param value the `struct AddressInfo`
209 * @return #GNUNET_YES to continue to iterate, #GNUNET_NO if we found the value
210 */
211static int
212find_ai_no_session_cb (void *cls,
213 const struct GNUNET_PeerIdentity *key,
214 void *value)
215{
216 struct FindClosure *fc = cls;
217 struct AddressInfo *ai = value;
218
219 if (ai->expired)
220 return GNUNET_YES; /* expired do not count here */
221 if (0 ==
222 GNUNET_HELLO_address_cmp (fc->address,
223 ai->address))
224 {
225 fc->ret = ai;
226 return GNUNET_NO;
227 }
228 return GNUNET_YES;
229}
230
231
232/**
233 * Find the address information struct for the
234 * given address (ignoring sessions)
235 *
236 * @param address address to look for
237 * @return NULL if this combination is unknown
238 */
239static struct AddressInfo *
240find_ai_no_session (const struct GNUNET_HELLO_Address *address)
241{
242 struct FindClosure fc;
243
244 fc.address = address;
245 fc.session = NULL;
246 fc.ret = NULL;
247 GNUNET_CONTAINER_multipeermap_get_multiple (p2a,
248 &address->peer,
249 &find_ai_no_session_cb,
250 &fc);
251 return fc.ret;
252}
253
254
255/**
256 * Test if ATS knows about this @a address and @a session.
257 * Note that even if the address is expired, we return
258 * #GNUNET_YES if the respective session matches.
259 *
260 * @param address the address
261 * @param session the session
262 * @return #GNUNET_YES if @a address is known, #GNUNET_NO if not.
263 */
264int
265GST_ats_is_known (const struct GNUNET_HELLO_Address *address,
266 struct GNUNET_ATS_Session *session)
267{
268 return (NULL != find_ai (address, session)) ? GNUNET_YES : GNUNET_NO;
269}
270
271
272/**
273 * Test if ATS knows about this @a address. Note that
274 * expired addresses do not count.
275 *
276 * @param address the address
277 * @return #GNUNET_YES if @a address is known, #GNUNET_NO if not.
278 */
279int
280GST_ats_is_known_no_session (const struct GNUNET_HELLO_Address *address)
281{
282 return (NULL != find_ai_no_session (address))
283 ? GNUNET_YES
284 : GNUNET_NO;
285}
286
287
288/**
289 * The blocking time for an address has expired, allow ATS to
290 * suggest it again.
291 *
292 * @param cls the `struct AddressInfo` of the address to unblock
293 */
294static void
295unblock_address (void *cls)
296{
297 struct AddressInfo *ai = cls;
298
299 ai->unblock_task = NULL;
300 LOG (GNUNET_ERROR_TYPE_DEBUG,
301 "Unblocking address %s of peer %s\n",
302 GST_plugins_a2s (ai->address),
303 GNUNET_i2s (&ai->address->peer));
304 ai->ar = GNUNET_ATS_address_add (GST_ats,
305 ai->address,
306 ai->session,
307 &ai->properties);
308 GNUNET_break (NULL != ai->ar);
309 num_blocked--;
310 publish_p2a_stat_update ();
311}
312
313
314/**
315 * Temporarily block a valid address for use by ATS for address
316 * suggestions. This function should be called if an address was
317 * suggested by ATS but failed to perform (i.e. failure to establish a
318 * session or to exchange the PING/PONG).
319 *
320 * @param address the address to block
321 * @param session the session (can be NULL)
322 */
323void
324GST_ats_block_address (const struct GNUNET_HELLO_Address *address,
325 struct GNUNET_ATS_Session *session)
326{
327 struct AddressInfo *ai;
328
329 if (0 ==
330 memcmp (&GST_my_identity,
331 &address->peer,
332 sizeof(struct GNUNET_PeerIdentity)))
333 return; /* our own, ignore! */
334 ai = find_ai (address,
335 session);
336 if ((NULL == ai) || (NULL == ai->ar))
337 {
338 /* The address is already gone/blocked, this can happen during a blacklist
339 * callback. */
340 return;
341 }
342 ai->back_off = GNUNET_TIME_STD_BACKOFF (ai->back_off);
343 if (GNUNET_YES ==
344 GNUNET_HELLO_address_check_option (address,
345 GNUNET_HELLO_ADDRESS_INFO_INBOUND))
346 LOG (GNUNET_ERROR_TYPE_DEBUG,
347 "Removing address %s of peer %s from use (inbound died)\n",
348 GST_plugins_a2s (address),
349 GNUNET_i2s (&address->peer));
350 else
351 LOG (GNUNET_ERROR_TYPE_INFO,
352 "Blocking address %s of peer %s from use for %s\n",
353 GST_plugins_a2s (address),
354 GNUNET_i2s (&address->peer),
355 GNUNET_STRINGS_relative_time_to_string (ai->back_off,
356 GNUNET_YES));
357 /* destroy session and address */
358 if ((NULL == session) ||
359 (GNUNET_NO ==
360 GNUNET_ATS_address_del_session (ai->ar,
361 session)))
362 {
363 GNUNET_ATS_address_destroy (ai->ar);
364 }
365 /* "ar" has been freed, regardless how the branch
366 above played out: it was either freed in
367 #GNUNET_ATS_address_del_session() because it was
368 incoming, or explicitly in
369 #GNUNET_ATS_address_del_session(). */ai->ar = NULL;
370
371 /* determine when the address should come back to life */
372 ai->blocked = GNUNET_TIME_relative_to_absolute (ai->back_off);
373 ai->unblock_task = GNUNET_SCHEDULER_add_delayed (ai->back_off,
374 &unblock_address,
375 ai);
376 num_blocked++;
377 publish_p2a_stat_update ();
378}
379
380
381/**
382 * Reset address blocking time. Resets the exponential
383 * back-off timer for this address to zero. Called when
384 * an address was used to create a successful connection.
385 *
386 * @param address the address to reset the blocking timer
387 * @param session the session (can be NULL)
388 */
389void
390GST_ats_block_reset (const struct GNUNET_HELLO_Address *address,
391 struct GNUNET_ATS_Session *session)
392{
393 struct AddressInfo *ai;
394
395 if (0 ==
396 memcmp (&GST_my_identity,
397 &address->peer,
398 sizeof(struct GNUNET_PeerIdentity)))
399 return; /* our own, ignore! */
400 ai = find_ai (address, session);
401 if (NULL == ai)
402 {
403 GNUNET_break (0);
404 return;
405 }
406 /* address is in successful use, so it should not be blocked right now */
407 GNUNET_break (NULL == ai->unblock_task);
408 ai->back_off = GNUNET_TIME_UNIT_ZERO;
409}
410
411
412/**
413 * Notify ATS about a new inbound @a address. The @a address in
414 * combination with the @a session must be new, but this function will
415 * perform a santiy check. If the @a address is indeed new, make it
416 * available to ATS.
417 *
418 * @param address the address
419 * @param session the session
420 * @param prop performance information
421 */
422void
423GST_ats_add_inbound_address (const struct GNUNET_HELLO_Address *address,
424 struct GNUNET_ATS_Session *session,
425 const struct GNUNET_ATS_Properties *prop)
426{
427 struct GNUNET_ATS_AddressRecord *ar;
428 struct AddressInfo *ai;
429
430 if (0 ==
431 memcmp (&GST_my_identity,
432 &address->peer,
433 sizeof(struct GNUNET_PeerIdentity)))
434 return; /* our own, ignore! */
435
436 /* Sanity checks for a valid inbound address */
437 if (NULL == address->transport_name)
438 {
439 GNUNET_break (0);
440 return;
441 }
442 GNUNET_break (GNUNET_NT_UNSPECIFIED != prop->scope);
443 GNUNET_assert (GNUNET_YES ==
444 GNUNET_HELLO_address_check_option (address,
445 GNUNET_HELLO_ADDRESS_INFO_INBOUND));
446 GNUNET_assert (NULL != session);
447 ai = find_ai (address, session);
448 if (NULL != ai)
449 {
450 /* This should only be called for new sessions, and thus
451 we should not already have the address */
452 GNUNET_break (0);
453 return;
454 }
455 /* Is indeed new, let's tell ATS */
456 LOG (GNUNET_ERROR_TYPE_DEBUG,
457 "Notifying ATS about peer `%s''s new inbound address `%s' session %p in network %s\n",
458 GNUNET_i2s (&address->peer),
459 GST_plugins_a2s (address),
460 session,
461 GNUNET_NT_to_string (prop->scope));
462 ar = GNUNET_ATS_address_add (GST_ats,
463 address,
464 session,
465 prop);
466 GNUNET_assert (NULL != ar);
467 ai = GNUNET_new (struct AddressInfo);
468 ai->address = GNUNET_HELLO_address_copy (address);
469 ai->session = session;
470 ai->properties = *prop;
471 ai->ar = ar;
472 (void) GNUNET_CONTAINER_multipeermap_put (p2a,
473 &ai->address->peer,
474 ai,
475 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
476 publish_p2a_stat_update ();
477}
478
479
480/**
481 * Notify ATS about the new address including the network this address is
482 * located in. The address must NOT be inbound and must be new to ATS.
483 *
484 * @param address the address
485 * @param prop performance information
486 */
487void
488GST_ats_add_address (const struct GNUNET_HELLO_Address *address,
489 const struct GNUNET_ATS_Properties *prop)
490{
491 struct GNUNET_ATS_AddressRecord *ar;
492 struct AddressInfo *ai;
493
494 if (0 ==
495 memcmp (&GST_my_identity,
496 &address->peer,
497 sizeof(struct GNUNET_PeerIdentity)))
498 return; /* our own, ignore! */
499 /* validadte address */
500 if (NULL == address->transport_name)
501 {
502 GNUNET_break (0);
503 return;
504 }
505 GNUNET_assert (GNUNET_YES !=
506 GNUNET_HELLO_address_check_option (address,
507 GNUNET_HELLO_ADDRESS_INFO_INBOUND));
508 ai = find_ai_no_session (address);
509 GNUNET_assert (NULL == ai);
510 GNUNET_break (GNUNET_NT_UNSPECIFIED != prop->scope);
511
512 /* address seems sane, let's tell ATS */
513 LOG (GNUNET_ERROR_TYPE_INFO,
514 "Notifying ATS about peer %s's new address `%s'\n",
515 GNUNET_i2s (&address->peer),
516 GST_plugins_a2s (address));
517 ar = GNUNET_ATS_address_add (GST_ats,
518 address,
519 NULL,
520 prop);
521 GNUNET_assert (NULL != ar);
522 ai = GNUNET_new (struct AddressInfo);
523 ai->address = GNUNET_HELLO_address_copy (address);
524 ai->ar = ar;
525 ai->properties = *prop;
526 (void) GNUNET_CONTAINER_multipeermap_put (p2a,
527 &ai->address->peer,
528 ai,
529 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
530 publish_p2a_stat_update ();
531}
532
533
534/**
535 * Notify ATS about a new @a session now existing for the given
536 * @a address. Essentially, an outbound @a address was used
537 * to establish a @a session. It is safe to call this function
538 * repeatedly for the same @a address and @a session pair.
539 *
540 * @param address the address
541 * @param session the session
542 */
543void
544GST_ats_new_session (const struct GNUNET_HELLO_Address *address,
545 struct GNUNET_ATS_Session *session)
546{
547 struct AddressInfo *ai;
548
549 if (0 ==
550 memcmp (&GST_my_identity,
551 &address->peer,
552 sizeof(struct GNUNET_PeerIdentity)))
553 return; /* our own, ignore! */
554 ai = find_ai (address, NULL);
555 if (NULL == ai)
556 {
557 /* We may simply already be aware of the session, even if some
558 other part of the code could not tell if it just created a new
559 session or just got one recycled from the plugin; hence, we may
560 be called with "new" session even for an "old" session; in that
561 case, check that this is the case, but just ignore it. */GNUNET_assert (NULL != (find_ai (address, session)));
562 return;
563 }
564 GNUNET_assert (NULL == ai->session);
565 ai->session = session;
566 LOG (GNUNET_ERROR_TYPE_DEBUG,
567 "Telling ATS about new session for peer %s\n",
568 GNUNET_i2s (&address->peer));
569 /* Note that the address might currently be blocked; we only
570 tell ATS about the session if the address is currently not
571 blocked; otherwise, ATS will be told about the session on
572 unblock. */
573 if (NULL != ai->ar)
574 GNUNET_ATS_address_add_session (ai->ar,
575 session);
576 else
577 GNUNET_assert (NULL != ai->unblock_task);
578}
579
580
581/**
582 * Release memory used by the given address data.
583 *
584 * @param ai the `struct AddressInfo`
585 */
586static void
587destroy_ai (struct AddressInfo *ai)
588{
589 GNUNET_assert (NULL == ai->session);
590 if (NULL != ai->unblock_task)
591 {
592 GNUNET_SCHEDULER_cancel (ai->unblock_task);
593 ai->unblock_task = NULL;
594 num_blocked--;
595 }
596 GNUNET_assert (GNUNET_YES ==
597 GNUNET_CONTAINER_multipeermap_remove (p2a,
598 &ai->address->peer,
599 ai));
600 LOG (GNUNET_ERROR_TYPE_DEBUG,
601 "Telling ATS to destroy address from peer %s\n",
602 GNUNET_i2s (&ai->address->peer));
603 if (NULL != ai->ar)
604 {
605 GNUNET_ATS_address_destroy (ai->ar);
606 ai->ar = NULL;
607 }
608 publish_p2a_stat_update ();
609 GNUNET_HELLO_address_free (ai->address);
610 GNUNET_free (ai);
611}
612
613
614/**
615 * Notify ATS that the @a session (but not the @a address) of
616 * a given @a address is no longer relevant. (The @a session
617 * went down.) This function may be called even if for the
618 * respective outbound address #GST_ats_new_session() was
619 * never called and thus the pair is unknown to ATS. In this
620 * case, the call is simply ignored.
621 *
622 * @param address the address
623 * @param session the session
624 */
625void
626GST_ats_del_session (const struct GNUNET_HELLO_Address *address,
627 struct GNUNET_ATS_Session *session)
628{
629 struct AddressInfo *ai;
630
631 if (0 ==
632 memcmp (&GST_my_identity,
633 &address->peer,
634 sizeof(struct GNUNET_PeerIdentity)))
635 return; /* our own, ignore! */
636 if (NULL == session)
637 {
638 GNUNET_break (0);
639 return;
640 }
641 ai = find_ai (address,
642 session);
643 if (NULL == ai)
644 {
645 /* We sometimes create sessions just for sending a PING,
646 and if those are destroyed they were never known to
647 ATS which means we end up here (however, in this
648 case, the address must be an outbound address). */
649 GNUNET_break (GNUNET_YES !=
650 GNUNET_HELLO_address_check_option (address,
651 GNUNET_HELLO_ADDRESS_INFO_INBOUND));
652 return;
653 }
654 GNUNET_assert (session == ai->session);
655 ai->session = NULL;
656 LOG (GNUNET_ERROR_TYPE_DEBUG,
657 "Telling ATS to destroy session %p from peer %s\n",
658 session,
659 GNUNET_i2s (&address->peer));
660 if (GNUNET_YES == ai->expired)
661 {
662 /* last reason to keep this 'ai' around is now gone, the
663 session is dead as well, clean up */
664 if (NULL != ai->ar)
665 {
666 /* Address expired but not blocked, and thus 'ar' was still
667 live because of the session; deleting just the session
668 will do for an inbound session, but for an outbound we
669 then also need to destroy the address with ATS. */
670 if (GNUNET_NO ==
671 GNUNET_ATS_address_del_session (ai->ar,
672 session))
673 {
674 GNUNET_ATS_address_destroy (ai->ar);
675 }
676 /* "ar" has been freed, regardless how the branch
677 above played out: it was either freed in
678 #GNUNET_ATS_address_del_session() because it was
679 incoming, or explicitly in
680 #GNUNET_ATS_address_del_session(). */ai->ar = NULL;
681 }
682 destroy_ai (ai);
683 return;
684 }
685
686 if (NULL == ai->ar)
687 {
688 /* If ATS doesn't know about the address/session, this means
689 this address was blocked. */
690 if (GNUNET_YES ==
691 GNUNET_HELLO_address_check_option (address,
692 GNUNET_HELLO_ADDRESS_INFO_INBOUND))
693 {
694 /* This was a blocked inbound session, which now lost the
695 session. But inbound addresses are by themselves useless,
696 so we must forget about the address as well. */
697 destroy_ai (ai);
698 return;
699 }
700 /* Otherwise, we are done as we have set `ai->session` to NULL
701 already and ATS will simply not be told about the session when
702 the connection is unblocked and the outbound address becomes
703 available again. . */
704 return;
705 }
706
707 /* This is the "simple" case where ATS knows about the session and
708 the address is neither blocked nor expired. Delete the session,
709 and if it was inbound, free the address as well. */
710 if (GNUNET_YES ==
711 GNUNET_ATS_address_del_session (ai->ar,
712 session))
713 {
714 /* This was an inbound address, the session is now gone, so we
715 need to also forget about the address itself. */
716 ai->ar = NULL;
717 destroy_ai (ai);
718 }
719}
720
721
722/**
723 * Notify ATS about DV @a distance change to an @a address.
724 * Does nothing if the @a address is not known to us.
725 *
726 * @param address the address
727 * @param distance new distance value
728 */
729void
730GST_ats_update_distance (const struct GNUNET_HELLO_Address *address,
731 uint32_t distance)
732{
733 struct AddressInfo *ai;
734
735 ai = find_ai_no_session (address);
736 if (NULL == ai)
737 {
738 /* We do not know about this address, do nothing. */
739 return;
740 }
741 LOG (GNUNET_ERROR_TYPE_DEBUG,
742 "Updated distance for peer `%s' to %u\n",
743 GNUNET_i2s (&address->peer),
744 distance);
745 ai->properties.distance = distance;
746 /* Give manipulation its chance to change metrics */
747 GST_manipulation_manipulate_metrics (address,
748 ai->session,
749 &ai->properties);
750 /* Address may be blocked, only give ATS if address is
751 currently active. */
752 if (NULL != ai->ar)
753 GNUNET_ATS_address_update (ai->ar,
754 &ai->properties);
755}
756
757
758/**
759 * Notify ATS about @a delay changes to properties of an @a address.
760 * Does nothing if the @a address is not known to us.
761 *
762 * @param address the address
763 * @param delay new delay value
764 */
765void
766GST_ats_update_delay (const struct GNUNET_HELLO_Address *address,
767 struct GNUNET_TIME_Relative delay)
768{
769 struct AddressInfo *ai;
770
771 ai = find_ai_no_session (address);
772 if (NULL == ai)
773 {
774 /* We do not know about this address, do nothing. */
775 return;
776 }
777 LOG (GNUNET_ERROR_TYPE_DEBUG,
778 "Updated latency for peer `%s' to %s\n",
779 GNUNET_i2s (&address->peer),
780 GNUNET_STRINGS_relative_time_to_string (delay,
781 GNUNET_YES));
782 ai->properties.delay = delay;
783 /* Give manipulation its chance to change metrics */
784 GST_manipulation_manipulate_metrics (address,
785 ai->session,
786 &ai->properties);
787 /* Address may be blocked, only give ATS if address is
788 currently active. */
789 if (NULL != ai->ar)
790 GNUNET_ATS_address_update (ai->ar,
791 &ai->properties);
792}
793
794
795/**
796 * Notify ATS about utilization changes to an @a address.
797 * Does nothing if the @a address is not known to us.
798 *
799 * @param address our information about the address
800 * @param bps_in new utilization inbound
801 * @param bps_out new utilization outbound
802 */
803void
804GST_ats_update_utilization (const struct GNUNET_HELLO_Address *address,
805 uint32_t bps_in,
806 uint32_t bps_out)
807{
808 struct AddressInfo *ai;
809
810 ai = find_ai_no_session (address);
811 if (NULL == ai)
812 {
813 /* We do not know about this address, do nothing. */
814 return;
815 }
816 LOG (GNUNET_ERROR_TYPE_DEBUG,
817 "Updating utilization for peer `%s' address %s: %u/%u\n",
818 GNUNET_i2s (&address->peer),
819 GST_plugins_a2s (address),
820 (unsigned int) bps_in,
821 (unsigned int) bps_out);
822 ai->properties.utilization_in = bps_in;
823 ai->properties.utilization_out = bps_out;
824 /* Give manipulation its chance to change metrics */
825 GST_manipulation_manipulate_metrics (address,
826 ai->session,
827 &ai->properties);
828 /* Address may be blocked, only give ATS if address is
829 currently active. */
830 if (NULL != ai->ar)
831 GNUNET_ATS_address_update (ai->ar,
832 &ai->properties);
833}
834
835
836/**
837 * Notify ATS that the address has expired and thus cannot
838 * be used any longer. This function must only be called
839 * if the corresponding session is already gone.
840 *
841 * @param address the address
842 */
843void
844GST_ats_expire_address (const struct GNUNET_HELLO_Address *address)
845{
846 struct AddressInfo *ai;
847
848 if (0 ==
849 memcmp (&GST_my_identity,
850 &address->peer,
851 sizeof(struct GNUNET_PeerIdentity)))
852 return; /* our own, ignore! */
853 LOG (GNUNET_ERROR_TYPE_DEBUG,
854 "Address %s of peer %s expired\n",
855 GST_plugins_a2s (address),
856 GNUNET_i2s (&address->peer));
857 ai = find_ai_no_session (address);
858 if (NULL == ai)
859 {
860 GNUNET_assert (0);
861 return;
862 }
863 if (NULL != ai->session)
864 {
865 /* Got an active session, just remember the expiration
866 and act upon it when the session goes down. */
867 ai->expired = GNUNET_YES;
868 return;
869 }
870 /* Address expired, no session, free resources */
871 destroy_ai (ai);
872}
873
874
875/**
876 * Initialize ATS subsystem.
877 */
878void
879GST_ats_init ()
880{
881 p2a = GNUNET_CONTAINER_multipeermap_create (4, GNUNET_YES);
882}
883
884
885/**
886 * Release memory used by the given address data.
887 *
888 * @param cls NULL
889 * @param key which peer is this about
890 * @param value the `struct AddressInfo`
891 * @return #GNUNET_OK (continue to iterate)
892 */
893static int
894destroy_ai_cb (void *cls,
895 const struct GNUNET_PeerIdentity *key,
896 void *value)
897{
898 struct AddressInfo *ai = value;
899
900 destroy_ai (ai);
901 return GNUNET_OK;
902}
903
904
905/**
906 * Shutdown ATS subsystem.
907 */
908void
909GST_ats_done ()
910{
911 GNUNET_CONTAINER_multipeermap_iterate (p2a,
912 &destroy_ai_cb,
913 NULL);
914 publish_p2a_stat_update ();
915 GNUNET_CONTAINER_multipeermap_destroy (p2a);
916 p2a = NULL;
917}
918
919
920/* end of gnunet-service-transport_ats.c */
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